{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["Chemical"], "input": "Unlike STAT5b ( A630P ) , which showed minimal GH - induced tyrosine phosphorylation and no transcriptional activity , STAT5b ( F646S ) became tyrosine phosphorylated after GH treatment and could function as a GH - activated transcription factor , although to a substantially lesser extent than STAT5b ( WT ) ."}
{"Chemical": ["tyrosine"]}